Sioux Chief Manufacturing produces engineered plumbing systems including the OxBox washing-machine outlet box, ProBox water-heater pans, ProGuard pipe supports, and Manabloc PEX manifolds. The Kansas City-based brand is a major spec across residential rough-in.

Slant/Fin manufactures hydronic baseboard heating, fin-tube convectors, residential boilers, and humidifiers. Its Fine/Line baseboard is a longtime standard for hot-water heating in homes and small commercial buildings.

Sloan Valve Company manufactures commercial flushometers, sensor-operated faucets, sinks, and water-saving plumbing products for institutional restrooms. Its Royal flushometer is the de facto standard for commercial public restrooms.

Jay R. Smith Manufacturing produces commercial plumbing drainage products including floor drains, cleanouts, roof drains, interceptors, and trench drains. The brand serves plumbing engineers on commercial, healthcare, and educational projects.

Southwark Metal manufactures sheet-metal duct fittings including elbows, transitions, takeoffs, and accessories for residential and commercial HVAC. Its galvanized fittings are stocked by HVAC distributors across the eastern U.S.

Stiebel Eltron is a German manufacturer of tankless electric water heaters, heat-pump water heaters, and heat pumps for space heating. Its Tempra and Accelera lines are widely specified in homes seeking efficient point-of-use or whole-home electric hot water.

Supco (Sealed Unit Parts Company) supplies HVAC and appliance replacement parts including capacitors, motors, hard-start kits, refrigerator parts, and meters. Its catalog covers nearly every legacy and current OEM equipment brand.

Swan, owned by The Swan Corporation, produces solid-surface bath and kitchen products including shower walls, tub surrounds, vanity tops, and laundry tubs. Its solid-surface and AcrylX product lines compete with cultured marble and tile alternatives.

System Sensor, a Honeywell brand, makes commercial fire-detection devices including smoke detectors, heat detectors, duct detectors, and notification appliances. Its products are core components of building fire-alarm and life-safety systems.

T&S Brass and Bronze Works manufactures commercial-grade faucets, pre-rinse units, and plumbing fittings for foodservice, healthcare, and institutional applications. Its B-series faucets and pre-rinse spray valves are workhorse fixtures in commercial kitchens.